class AutoML(object):
def __init__(self,
time_limit=300,
dataset_name='default_name',
amount_of_resource=None,
task_type=None,
metric='bal_acc',
include_algorithms=None,
ensemble_method='ensemble_selection',
enable_meta_algorithm_selection=True,
per_run_time_limit=150,
ensemble_size=50,
evaluation='holdout',
output_dir="logs",
logging_config=None,
random_state=1,
n_jobs=1):
self.metric_id = metric
self.metric = get_metric(self.metric_id)
self.dataset_name = dataset_name
self.time_limit = time_limit
self.seed = random_state
self.per_run_time_limit = per_run_time_limit
self.output_dir = output_dir
self.logging_config = logging_config
if not os.path.exists(self.output_dir):
os.makedirs(self.output_dir)
self.logger = self._get_logger(self.dataset_name)
self.evaluation_type = evaluation
self.amount_of_resource = amount_of_resource
self.ensemble_method = ensemble_method
self.ensemble_size = ensemble_size
self.enable_meta_algorithm_selection = enable_meta_algorithm_selection
self.task_type = task_type
self.n_jobs = n_jobs
self.solver = None
if include_algorithms is not None:
self.include_algorithms = include_algorithms
else:
if task_type in CLS_TASKS:
self.include_algorithms = list(classification_algorithms)
elif task_type in REG_TASKS:
self.include_algorithms = list(regression_algorithms)
else:
raise ValueError("Unknown task type %s" % task_type)
if ensemble_method is not None and ensemble_method not in ensemble_list:
raise ValueError("%s is not supported for ensemble!" %
ensemble_method)
def _get_logger(self, name):
logger_name = 'SolnML-%s(%d)' % (name, self.seed)
setup_logger(
os.path.join(self.output_dir, '%s.log' % str(logger_name)),
self.logging_config,
)
return get_logger(logger_name)
def fit(self, train_data: DataNode, dataset_id=None):
"""
this function includes this following two procedures.
1. tune each algorithm's hyperparameters.
2. engineer each algorithm's features automatically.
:param train_data:
:return:
"""
if self.enable_meta_algorithm_selection:
try:
alad = AlgorithmAdvisor(task_type=self.task_type,
n_algorithm=9,
metric=self.metric_id)
n_algo = 5
model_candidates = alad.fetch_algorithm_set(
train_data, dataset_id=dataset_id)
include_models = list()
for algo in model_candidates:
if algo in self.include_algorithms and len(
include_models) < n_algo:
include_models.append(algo)
self.include_algorithms = include_models
self.logger.info(
'Executing meta-learning based algorithm recommendation!')
self.logger.info('Algorithms recommended: %s' %
','.join(self.include_algorithms))
except Exception as e:
self.logger.error("Meta-learning failed!")
# Check whether this dataset is balanced or not.
if self.task_type in CLS_TASKS and is_unbalanced_dataset(train_data):
# self.include_algorithms = imb_classication_algorithms
self.logger.info('Input dataset is imbalanced!')
train_data = DataBalancer().operate(train_data)
if self.amount_of_resource is None:
trial_num = len(self.include_algorithms) * 30
else:
trial_num = self.amount_of_resource
self.solver = FirstLayerBandit(
self.task_type,
trial_num,
self.include_algorithms,
train_data,
per_run_time_limit=self.per_run_time_limit,
dataset_name=self.dataset_name,
ensemble_method=self.ensemble_method,
ensemble_size=self.ensemble_size,
inner_opt_algorithm='fixed',
metric=self.metric,
fe_algo='bo',
seed=self.seed,
time_limit=self.time_limit,
eval_type=self.evaluation_type,
output_dir=self.output_dir)
self.solver.optimize()
def refit(self):
self.solver.refit()
def predict_proba(self, test_data: DataNode):
return self.solver.predict_proba(test_data)
def predict(self, test_data: DataNode):
return self.solver.predict(test_data)
def score(self, test_data: DataNode, metric_func=None):
if metric_func is None:
metric_func = self.metric
return metric_func(self, test_data, test_data.data[1])
def get_ens_model_info(self):
if self.ensemble_method is not None:
return self.solver.es.get_ens_model_info()
else:
return None
class AutoML(object):
def __init__(self,
time_limit=300,
dataset_name='default_name',
amount_of_resource=None,
task_type=None,
metric='bal_acc',
include_algorithms=None,
include_preprocessors=None,
ensemble_method='ensemble_selection',
enable_meta_algorithm_selection=True,
enable_fe=True,
per_run_time_limit=150,
ensemble_size=50,
evaluation='holdout',
output_dir="logs",
logging_config=None,
random_state=1,
n_jobs=1):
self.metric_id = metric
self.metric = get_metric(self.metric_id)
self.dataset_name = dataset_name
self.time_limit = time_limit
self.seed = random_state
self.per_run_time_limit = per_run_time_limit
self.output_dir = output_dir
self.logging_config = logging_config
self.logger = self._get_logger(self.dataset_name)
self.evaluation_type = evaluation
self.include_preprocessors = include_preprocessors
self.amount_of_resource = amount_of_resource
self.ensemble_method = ensemble_method
self.ensemble_size = ensemble_size
self.enable_meta_algorithm_selection = enable_meta_algorithm_selection
self.enable_fe = enable_fe
self.task_type = task_type
self.n_jobs = n_jobs
self.solver = None
# Disable meta learning
if self.include_preprocessors is not None:
self.enable_meta_algorithm_selection = False
if include_algorithms is not None:
self.include_algorithms = include_algorithms
else:
if task_type in CLS_TASKS:
if task_type in [IMG_CLS, TEXT_CLS]:
raise ValueError(
'Please use AutoDL module, instead of AutoML.')
else:
self.include_algorithms = list(classification_algorithms)
elif task_type in RGS_TASKS:
self.include_algorithms = list(regression_algorithms)
else:
raise ValueError("Unknown task type %s" % task_type)
if ensemble_method is not None and ensemble_method not in ensemble_list:
raise ValueError("%s is not supported for ensemble!" %
ensemble_method)
def _get_logger(self, name):
logger_name = 'SolnML-%s(%d)' % (name, self.seed)
setup_logger(
os.path.join(self.output_dir, '%s.log' % str(logger_name)),
self.logging_config,
)
return get_logger(logger_name)
def fit(self, train_data: DataNode, **kwargs):
"""
This function includes this following two procedures.
1. tune each algorithm's hyperparameters.
2. engineer each algorithm's features automatically.
:param train_data:
:return:
"""
# Check whether this dataset is balanced or not.
# if self.task_type in CLS_TASKS and is_imbalanced_dataset(train_data):
# self.logger.info('Input dataset is imbalanced!')
# train_data = DataBalancer().operate(train_data)
dataset_id = kwargs.get('dataset_id', None)
inner_opt_algorithm = kwargs.get('opt_strategy', 'alter_hpo')
self.logger.info('Optimization algorithm in 2rd bandit: %s' %
inner_opt_algorithm)
if self.enable_meta_algorithm_selection:
try:
n_algo_recommended = 5
meta_datasets = kwargs.get('meta_datasets', None)
self.logger.info(
'Executing Meta-Learning based Algorithm Recommendation.')
alad = RankNetAdvisor(task_type=self.task_type,
n_algorithm=n_algo_recommended,
metric=self.metric_id)
alad.fit()
model_candidates = alad.fetch_algorithm_set(
dataset_id, datanode=train_data)
include_models = list()
for algo in model_candidates:
if algo in self.include_algorithms and len(
include_models) < n_algo_recommended:
include_models.append(algo)
# if 'logistic_regression' in include_models:
# include_models.remove('logistic_regression')
# if 'adaboost' not in include_models:
# include_models.append('adaboost')
# include_models = ['extra_trees', 'adaboost', 'liblinear_svc', 'random_forest',
# 'libsvm_svc', 'lightgbm']
self.include_algorithms = include_models
self.logger.info('Final Algorithms Recommended: [%s]' %
','.join(self.include_algorithms))
except Exception as e:
self.logger.error(
"Meta-Learning based Algorithm Recommendation FAILED: %s."
% str(e))
traceback.print_exc(file=sys.stdout)
self.solver = FirstLayerBandit(
self.task_type,
self.amount_of_resource,
self.include_algorithms,
train_data,
include_preprocessors=self.include_preprocessors,
per_run_time_limit=self.per_run_time_limit,
dataset_name=self.dataset_name,
ensemble_method=self.ensemble_method,
ensemble_size=self.ensemble_size,
inner_opt_algorithm=inner_opt_algorithm,
metric=self.metric,
enable_fe=self.enable_fe,
fe_algo='bo',
seed=self.seed,
time_limit=self.time_limit,
eval_type=self.evaluation_type,
output_dir=self.output_dir)
self.solver.optimize()
def refit(self):
self.solver.refit()
def predict_proba(self, test_data: DataNode):
return self.solver.predict_proba(test_data)
def predict(self, test_data: DataNode):
return self.solver.predict(test_data)
def score(self, test_data: DataNode, metric_func=None):
if metric_func is None:
metric_func = self.metric
return metric_func(self, test_data, test_data.data[1])
def get_ens_model_info(self):
if self.ensemble_method is not None:
return self.solver.es.get_ens_model_info()
else:
return None
def get_val_stats(self):
return self.solver.get_stats()
